298 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



HERBSTIA DEPRESSA Stimpson 



Plate 104, fig. 1 



Herbstia depressa Stimpson, Ann. Lye. Nat. Hist. N. Y., vol. 7, 1860, p. 



185 [57] (type-locality, St. Thomas; type not extant). — Rathbun, Univ. 



Iowa Studies Nat. Hist., vol. 9, No. 5, 1921, p. 81, pi. 2, fig. 4. 

 Herbstiella depressa Stimpson, Ann. Lye. Nat. Hist. N. Y., vol. 10, 1871 > 



p. 93. 

 fHerbstia (Herbstiella) depressa? Miers, Challenger Rept., Zool., vol. 17, 



1886, p. 51, pi. 7, fig. 2. 



Diagnosis. — Palm unarmed. Two spines on outer margin of basal 

 antennal article, including that at anterior angle; first movable 

 article advanced nearly to tip of rostrum. 



Description. — Carapace much depressed, generally covered with 

 sordes adhering to a slight pubescence easily detached, beneath 

 which the surface is glabrous and less tuberculous than in H. campta- 

 cantha. A median protuberance on the gastric, and one on the 

 cardiac region; two tubercles on the intestinal region in a transverse 

 row. Lateral and posterior margins armed with small subspiniform 

 tubercles. A stout spine on the hepatic region. Rostriun rather 

 short and broad, cleft for one-half its length ; horns triangular, acute. 

 Frontal region and surface of rostrum with a median longitudinal 

 sulcus between two short prominent ridges. Preorbital teeth, orbits 

 and antennae nearly as in camptacantha. Basal spine of antennae 

 long, projecting almost as far as horns of rostrum. Exognath of 

 external maxillipeds broad, fusiform, almost angular at middle of 

 external margin. 



Chelipeds shorter than next leg; merus armetl with one row of 

 spines above, elsewhere smooth; carpus with numerous very short 

 spines on upper surface; hand glabrous. Ambulatory legs slender, 

 hairy above; second pair two-thirds longer than carapace; merus of 

 all armed with spines above, sometimes below. (After Stimpson.) 



In a larger specimen than those above described there are four 

 additional tubercles or granules forming a transverse oblong on the 

 branchial region, two of the granules near the inner angle of this 

 region and the other two in a line posterior to the middle of the cardiac 

 region; also on dorsal surface a granule which forms a triangle with 

 the two marginal spines at the widest part of the carapace ; two teeth 

 on outer margin of basal antennal segment; seA^en spines and one 

 spinule on merus of cheliped, about 12 spinules and tubercles on wrist. 



Measurements. — Male type (Stimpson) , length of carapace 9.6 mm. 

 (0.38 inch), width 7.6 mm. (0,3 inch). Ovigeroiis female, Barbados^ 

 length including horns 14.8, median length 14, width 12 mm. 



Range. — St. Thomas; Barbados; Curapao. I think it very doubtful 

 if the specimen figured by Miers as a possible depressa is really one; 

 it lacks a preorbital spine and the rostral horns are cut too deep. 

 It is from Barra Grande, Brazil, lat. 9° 05' 00" to 9° 10' 00" S.; 



